> ## Documentation Index
> Fetch the complete documentation index at: https://arizeai-433a7140.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# LangChain4j

> LangChain4j is a Java library that provides APIs, tools, and patterns to easily build and integrate LLM-powered Java applications.

<Card title="LangChain4j" href="https://docs.langchain4j.dev/" icon="globe" horizontal>
  [](https://docs.langchain4j.dev/)
</Card>

<Columns cols={2}>
  <Card img="https://storage.googleapis.com/arize-phoenix-assets/assets/images/phoenix-docs-images/f1e5c9e9-image.avif" horizontal title="LangChain4j Tracing" href="/docs/phoenix/integrations/java/langchain4j/langchain4j-tracing" />
</Columns>